Escape some characters in vim rip-grep search

vimrc

@@ -197,7 +197,7 @@ call plug#begin('~/.vim/plugged')
 " MISC
 "////////////////////////////////////////////////////////////////
 
-Plug 'bling/vim-airline'              " Enhanced status/tabline.
+Plug 'vim-airline/vim-airline'        " Enhanced status/tabline.
 Plug 'embear/vim-localvimrc'          " Add a .lvimrc to a folder to override .vimrc config.
 Plug 'tpope/vim-obsession'            " Continuously updated session files (tracks window positions, open folds, etc).
 Plug 'tpope/vim-fugitive'             " Git wrapper (I particularly like :Gblame, which I've wrapped as :Blame)
@@ -352,7 +352,9 @@ set wildmenu
 set wildmode=longest,list,full
 set wildignore+=*/log/*,*.so,*.swp,*.zip,*/rdoc/*
 
-set grepprg=rg\ --vimgrep         " Requires ripgrep to be installed.
+if executable('rg')
+    set grepprg=rg\ --vimgrep\ --hidden " Requires ripgrep to be installed.
+endif
 
 set list listchars=tab:»·,trail:· " Show trailing whitespace.
 
@@ -1079,7 +1081,7 @@ function! CenterPane()
     " Taken from https://dev.to/vinneycavallo/easily-center-content-in-vim
     lefta vnew
     wincmd w
-    exec 'vertical resize' string(&columns * 0.75)
+    exec 'vertical resize' string(&columns * 0.65)
 endfunction
 nnoremap <leader>c :call CenterPane()<cr>
 
@@ -1419,15 +1421,20 @@ function! Search(path, search_args, case_insensitive=0)
         return
     endif
 
-    "@note --pretty (i.e. colors) is not enabled in vim-ripgrep because the
+    " @note --pretty (i.e. colors) is not enabled in vim-ripgrep because the
-    "quickfix window doesn't seem to parse the ansi color codes.
+    " quickfix window doesn't seem to parse the ansi color codes.
     let l:rg_args = "--column --line-number --no-heading --fixed-strings --no-ignore --hidden --follow --trim -g \"!tags\" -g \"!.git/\" -g \"!AppData/\" " . a:search_args
 
     if a:case_insensitive
         let l:rg_args .= " --ignore-case"
     endif
 
-    exec 'Rg ' . l:rg_args . ' -e "' . l:term . '"' . ' ' . a:path
+    " Some characters need to be escaped.
+    let l:escaped_term = substitute(l:term, '[#%]', '\\\\\\&', 'g')
+
+    let l:format = 'Rg ' . l:rg_args . ' ' . a:path . ' -e %s'
+    let l:cmd = printf(l:format, shellescape(l:escaped_term))
+    exec l:cmd
 endfunction
 
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